遺伝物質のコピーが増加したことが、恐竜を絶滅させた出来事を含む地球の主要な環境危機において、被子植物の生存を後押しした可能性があることがわかった。
被子植物470種を調査した研究によると、1億800万年前から1400万年前の間に発生した9つの激動期に、132の古代ゲノム重複が集中していることが判明した。これには気候変動、酸素濃度の変化、そして白亜紀末の6600万年前に起きた小惑星衝突などの大量絶滅が含まれる。
ゲノムの重複が被子植物の大量絶滅からの生存を助けた
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